I asked this question before:
http://forums.sjgames.com/showthread...hlight=apparel
In short, no, the WLF apparel items are not "official" in that they have rules associated to them.
[Edit]
I also assume, perhaps wrongly, that the new Amazon apparel also has no rules. The hoodie is comfy, though.
https://www.amazon.com/s/ref=nb_sb_n...+games+apparel